the heart, blood vessels & blood

• The circulatory system is an example of an organ system
• What is another name for the circulatory system?

  Cardiovascular system
• The circulatory system is made up of the heart, blood vessels, and blood.
• What is the role of blood in the circulatory system?

  Transport substances
• Blood vessels are responsible for directing blood around the body
• The heart pumps blood to ensure it keeps flowing through the blood vessels.
• Why is the circulatory system called a double circulatory system?

  Two separate circuits
• The systemic circuit carries blood to all body tissues
• The atrioventricular valves ensure that blood flows from the atria into the ventricles
• Blood is pumped from the heart to the lungs and then back to the heart in the pulmonary circuit.
• The left side of the heart pumps blood to the lungs, while the right side pumps blood to the body.

  False
• How many chambers does the human heart have?

  Four
• Match the heart chamber with its description:

  Atria ↔️ Upper chambers

  Ventricles ↔️ Lower chambers
• Order the flow of blood through the heart chambers and major vessels.

  1️⃣ Right atrium

  2️⃣ Right ventricle

  3️⃣ Pulmonary artery

  4️⃣ Pulmonary vein

  5️⃣ Left atrium

  6️⃣ Left ventricle

  7️⃣ Aorta
• Why is the left ventricle's wall thicker than the right ventricle's wall?

  Pumps blood to body
• Deoxygenated blood flows into the heart via the venina
• Which blood vessel carries oxygenated blood from the lungs to the left atrium?

  Pulmonary vein
• The aorta is the body's largest artery.
• Coronary arteries branch off the aorta to supply oxygen to the heart muscle
• The heart acts as the pump of the circulatory system.
• What are the three types of blood vessels in the circulatory system?

  Arteries, capillaries, veins
• Arteries carry blood away from the heart.
• What is the primary role of capillaries in the circulatory system?

  Substance exchange
• Veins carry blood back to the heart.
• The wall of an artery is thinner than the lumen.

  False
• Why do arteries need to be strong and elastic?

  High blood pressure
• Arteries have a thick layer of muscle tissue.
• Capillaries are only a single cell thick.
• What is the term for the hole or space in the middle of a blood vessel?

  Lumen
• Capillaries are permeable to allow substance exchange.
• Veins have valves to prevent blood from flowing backward.
• Why is the cross-sectional area of capillaries much larger than that of arteries?

  To lower blood pressure
• Veins have the largest lumen of any blood vessel.
• Order the flow of blood through the circulatory system:

  1️⃣ Arteries

  2️⃣ Capillaries

  3️⃣ Veins
• Veins have thicker walls than arteries.

  False
• What is the formula for calculating the rate of blood flow?

  Volume / Time
• If 2500 ml of blood passes through the aorta in 8 minutes, the rate of blood flow is 320 ml per minute.
• Blood consists of four main components: red blood cells, white blood cells, platelets, and plasma
• Red blood cells make up almost half of the blood's volume.
• What is the role of red blood cells in the body?

  Carry oxygen